There is provided a USB cable for transmitting data at an ultra high speed at a frequency of 10 GHz or higher, the USB cable comprising a jacket, at least a power cable located within the jacket and a plurality of shielded insulated conductors, Wherein the insulator of the insulated conductor exhibits a dissipation factor of less than 0.00035 at 10 GHz and is a melt-fabricable perfluoropolymer such as tetrafluoro Ethylene / hexafluoropropylene copolymer or tetrafluoroethylene / perfluoro (alkyl vinyl ether) copolymer.
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